Table-operating mechanism for lathes



(No Model.)

M. C. BOLLENBACHER. TABLE OPERATING MECHANISM FOR LATHES.

Patented Mar. 31, 1891.

NVENTOR:

BY z ATTORNEYS.

WITNESSES: /L M UNITED STATES MARTIN C. BOLLENBACIIER, OF

PATENT OEEIcE.

ILOOMINGTON, INDIANA.

SPECIFICATION forming part of Letters Patent No. 449,461, dated March31, 1891.

Application filed September 15, 1888. Renewed February 28, 1891. SerialNo. 388,146. (No model.)

T0 at whom it may concern.

Be it known that I, MARTIN CHRISTOPHER BOLLENBACHER, residing atBloomington, county of Monroe, and State of Indiana, have invented a newand useful Improvement in Table-Operating Mechanism for Lathes, of whichthe following is a specification.

In a certain class of lathes employed for turning spokes ofvehicle-wheels the wooden blank is secured between spindles whose bearings are attached to a reciprocating table which carries the blank inwardagainst rotary cutters. My improvement consists in the combination andarrangement of means for operating such table, as hereinafter describedand claimed.

The accompanying drawing exhibits a perspective view of a spoke-latheprovided with my improved attachment. The lathe is of the class known tospoke-manufacturers as the Naugatuck or art and is similar in mostrespects to that invented by lVilliam A. Kettenring and patented August15, 1885, No. 324,847. Aspoke 1 is shown held between live and deadspindles journaled in bearingboxes2 2, secured upon abed-plate,which isrigidly connected with the sliding table E. The said spindles and thespoke held between them are carried with the table as it is moved in andout on the frame D. The live-spindle receives motion from a shaft (notshown) having a spur-gear 3. The body of the spokeblank is operated onby rotary cutters 4, mounted fast on a shaft 5, carrying a drivepulleyG. A hood covers and protects the said cutters.

The tedder-board or treadle proper A is arranged parallel to the frontof the lathe and jonrnaled at or near the middle of its length on atransverse rod having its hearings in a bracket a, attached to thefloor. One end of this treadle is connected by a rod B with one arm I)of an elbow-lever O, which is journaled at its angle to the frame D of aspoke-lathe. Said lever operates the sliding table E of the lathe. Thespiral spring F connects the extremity of the arm I) of the elbow-leverC to the floor. Its function is to steady the operation of the apparatusby tending to draw the table E back and hold the lever and treadlenormally in one position, so that if required the treadle may beoperated with one foot.

The manner of operating my attachment is as follows: Thebefore-described arrangement l of the treadle A enables the operator tostand on it facing the machine, with his rightfoot on its outer or freeend and the left foot on the other side of the fulcrum between thebracket a and connecting-rod B, as indicated at a: m. The right. hand ofthe treadle is shown depressed and the tableE pushed in. Inclining I tothe left the operator depresses or allows l the spring F to depress theinner end of the treadle A, therebydrawing the lathe-table E back, sothat he is able conveniently to place a spoke-blank between thelathe-centers. Then by inclining to the right his body is placed out ofdanger from the cutters and shavings. At the same time he is able toreach and seize the next rough spoke or spokeblank, and his weight isbrought mainly on the outer end of the treadle, thus depressing it,which action tilts the elbow-lever C so that it forces the lathe-tableupward and brings the spoke-blank into contact with the cutters. Theattachment thus enables the operator to work the lathe with greater easethan by the means heretofore employed.

Having thus fully described my invention, what I claim is- 1. Thecombination, with the lathe-frame D and the spoke'carrying table E,sliding on said frame, of the elbow-lever O, jointed at its angle to thefront of said frame and loosely connected with the sliding table, thefoottreadle pivoted at or about its middle and arranged parallel to thefront of said frame, and the rod connecting the lever and treadle, asshown and described.

2. The combination, with the lathe-frame D and the spoke-carrying tableE, sliding on said frame, of the elbow-lever C, jointed at its angle tothe front of said frame and loosely connected with the sliding table,[the foottreadle pivoted at or about its middle and arranged parallel tothe front of said frame, the rod connecting the lever and treadle, andthe spring connecting outer arm of lever with the floor, as shown anddescribed.

MARTIN G. BOLLENBACIIER.

\Vitnesses:

LOUIS N. WILLIAMS, JOHN GRAHAM.

